From a series of photographs that could have been taken between 1908-1912. Borup spent the field season of 1910 on a topographical survey with the U.S. Geological Survey and spent time at the Yale Geological camp in the mountains of Virginia in 1911.

Source of Descriptive Information

Robert Peary, E. (1910). The North Pole: Its Discovery In 1909 Under the Auspices of the Peary Arctic Club. New York: Frederick A. Stokes Company.